Principal and secondary visual inputs are processed in separate pathways with distinct neuropil
regions, including separate laminae and medullae (Strausfeld and Barth, 1993; Strausfeld et al., 1993; Long, 2016).
The ir nerve fibers were detected throughout the neuropils
of the ganglion, especially in the dorsal and ventral horns (Fig.
"In branchiopods, there are always only two visual neuropils
and they are not linked by crossing fibers.
In these animals, such chemosensory information is conveyed to the central nervous system through two anatomically distinct but parallel pathways: the aesthetascolfactory lobe pathway and the non-aesthetasc-lateral antennular neuropil
pathway, which are reciprocally connected by local olfactory interneurons (Schmidt et al., 1992; Schmidt and Ache.
The immunoreactivity of both types of nerve fibers were also found throughout the neuropils
of the ganglia, especially in the dorsal and ventral horn regions, (Fig.
A semi-thin histological analysis with toluidine blue staining shows that the brain consists of a central core neuropil
and peripherally situated cell body regions with a pair of dorsal globuli groups (Loesel and Heuer, 2010; Fig.
Antennular withdrawal motoneurons in the lateral antennular neuropil
of Callinectes sapidus.
Notable features in the ventral and lateral nerve cords are some large, distinct ganglionic masses with ovoid neuropils
in the head region (Fig.
6) and the ganglion neuropils
and connectives/commissures were characterized by an intensive GLU-LIR innervation from the early juvenile stages (Fig.
Crustacean ORN axons course within the antennular nerve to a specific, ipsilateral region of the deutocerebrum, the olfactory lobe (OL), characterized in all decapods (as in the immediate central nervous targets of olfactory axons in all other arthropods as well as in vertebrates) by compartmentalized aggregations of neuropil
referred to as glomeruli.
Microanatomical studies on the optic neuropiles
of an isopod, Ligia exotica Roux (Crustacea).
In the CG, as in crustacean ganglia generally, synaptic interactions occur in complex neuropils
formed by collateral processes and branches from axons (Alexandrowicz, 1932, 1934, 1952; Obsawn, 1972; Aizu, 1975; Hawkins and Howse, 1978; Mirolli et at., 1987; Morganelli and Sherman, 1987).